Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Fair value portion of investments accounted under the cost method.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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COST METHOD INVESTMENT (Additional Information) (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 BRL	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Boa Vista Servicos S.A.	Dec. 31, 2012 Boa Vista Servicos S.A. BRL
Schedule of Cost-method Investments [Line Items]
Percentage of interest in Boa Vista Servicos S.A.					15.00%
Investment in Boa Vista Servicos S.A.						130
Cost Method Investments, Fair Value Disclosure		38.2	90.0
Cost-method Investments, Other than Temporary Impairment	$ 0	$ 17.0	40.0	$ 0